Newtons laws
what is newtons first law of motion?
inertia
an object in motion say in motion until acted on by an unbalanced force
what is the formula for speed?
distance divided by time
if displacement equal 10 and time equals 2 calculate the velocity
10/2=5m/s
what is the standard of time?
seconds (s)
what a scalar quantity?
a quantity measured by magnitude alone
what is the formula for velocity?
displacement/time
if distance equal 16 and time equals 4 calculate the speed
16/4=4m/s
what is the standard unit is distance?
meters (m)
what is a vector quantity?
a quantity with magnitude and direction
what is newtons second law?
f=ma
how do you find time using velocity?
velocity/displacement
if the mass of an object is 16kg and the velocity is 24 then what is the momentum
p=mv
16X24=384kg m/s
m/s
what is the difference between scalar and vector
vector uses direction scalar does not
what is the formula for acceleration?
(initial velocity - final velocity)/time
if an object's mass is 15kg and it's acceleration is 7m/s2 calculate the net force
f=ma
15X7=105N
what is the unit for acceleration?
m/s2
what is the difference between distance and displacement?
a direction
what is newtons third law of motion?
every action has equal opposite reaction
what is the formula for momentum during collisions?
m1v1+m2v2=m1'v1'+m2'v2'
a car with a mass of 350kg is moving at 15m/s collides with a stationary vehicle with a mass of 240kg. after colliding the car stops and the vehicle begins to move calculate the momentum
m1v1+m2v2=m1'v1'+m2'v2'
350X15+240X0=350X0+240Xx
350X15=240Xx
5250=240Xx
5010=x
what is the units used for momentum?
kg m/s
what is an standard deviation?
measurement that shows the spread of data